Filter cartridge



FIG. 1 is a front perspective view of the filter cartridge showing our new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a right side elevational view thereof, the left, top and bottom side views being identical thereto;

FIG. 4 is a front end elevational view thereof;

FIG. 5 is a rear end elevational view thereof; and,

FIG. 6 is a perspective view of the filter cartridge in full lines with the broken lines showing environmental association matter being for illustrative purposes only and forming no part of the claimed design. 

The ornamental design for a filter cartridge, as shown and described. 